Just inline it

Author: rickhanlonii

.eslintrc.js

@@ -521,7 +521,6 @@ module.exports = {
     spyOnProd: 'readonly',
     __DEV__: 'readonly',
     __EXPERIMENTAL__: 'readonly',
-    __NEXT_MAJOR__: 'readonly',
     __EXTENSION__: 'readonly',
     __PROFILE__: 'readonly',
     __TEST__: 'readonly',

packages/shared/ReactFeatureFlags.js

@@ -137,8 +137,9 @@ export const transitionLaneExpirationMs = 5000;
 // -----------------------------------------------------------------------------
 // Ready for next major.
 //
-// __NEXT_MAJOR__ is an alias for __EXPERIMENTAL__.
+// Alias __NEXT_MAJOR__ to __EXPERIMENTAL__ for easier skimming.
 // -----------------------------------------------------------------------------
+const __NEXT_MAJOR__ = __EXPERIMENTAL__;
 
 // Not ready to break experimental yet.
 export const disableLegacyContext = false;

scripts/flow/environment.js

@@ -12,7 +12,6 @@
 declare var __PROFILE__: boolean;
 declare var __UMD__: boolean;
 declare var __EXPERIMENTAL__: boolean;
-declare var __NEXT_MAJOR__: boolean;
 declare var __VARIANT__: boolean;
 
 declare var __REACT_DEVTOOLS_GLOBAL_HOOK__: any; /*?{

scripts/jest/setupEnvironment.js

@@ -19,8 +19,6 @@ global.__EXPERIMENTAL__ =
     ? RELEASE_CHANNEL === 'experimental'
     : true;
 
-global.__NEXT_MAJOR__ = __EXPERIMENTAL__;
-
 global.__VARIANT__ = !!process.env.VARIANT;
 
 if (typeof window !== 'undefined') {

scripts/rollup/build.js

@@ -34,8 +34,6 @@ const __EXPERIMENTAL__ =
     ? RELEASE_CHANNEL === 'experimental'
     : true;
 
-const __NEXT_MAJOR__ = __EXPERIMENTAL__;
-
 // Errors in promises should be fatal.
 let loggedErrors = new Set();
 process.on('unhandledRejection', err => {
@@ -470,7 +468,6 @@ function getPlugins(
             ? "'production'"
             : "'development'",
           __EXPERIMENTAL__,
-          __NEXT_MAJOR__,
         },
       }),
       // The CommonJS plugin *only* exists to pull "art" into "react-art".